7mm stw brass?

Does anyone know why in the world the manufacturers are not making 7stw brass anymore? My brother called Remington last week and they said they were out of the 7stw brass business, not making anymore. I guess Layne Simpson sued them for making brass also or they just trying to put it out of business with the 7UM.
Hopefully they will have a run of 8mmRM brass this year, thould have stock piled it when I could.
FE